// Actual drop-down
private Widget getDropDown() {
String selected = "";
String selectedText = "";
box = new ListBox();
box.setEnabled(!isReadOnly);
box.addItem(HumanReadableConstants.INSTANCE.noCEPWindow(), "");
for (int i = 0; i < operators.size(); i++) {
String op = operators.get(i);
box.addItem(HumanReadable.getOperatorDisplayName(op), op);
if (op.equals(hcw.getWindow().getOperator())) {
selected = op;
selectedText = HumanReadable.getOperatorDisplayName(op);
box.setSelectedIndex(i + 1);
}
}
selectItem(hcw.getWindow().getOperator());
// Fire event to ensure parent Widgets correct their state depending on selection
final HasValueChangeHandlers<OperatorSelection> source = this;
final OperatorSelection selection = new OperatorSelection(selected, selectedText);
Scheduler.get()
.scheduleFinally(
new Command() {
public void execute() {
operatorChanged(selection);
ValueChangeEvent.fire(source, selection);
}
});
// Signal parent Widget whenever a change happens
box.addChangeHandler(
new ChangeHandler() {
public void onChange(ChangeEvent event) {
String selected = box.getValue(box.getSelectedIndex());
String selectedText = box.getItemText(box.getSelectedIndex());
OperatorSelection selection = new OperatorSelection(selected, selectedText);
operatorChanged(selection);
ValueChangeEvent.fire(source, selection);
}
});
return box;
}
